title: Photodissociation dynamics of C4H2 at 164.41 nm: competitive dissociation pathways.
abstract: Photodissociation dynamics of C4H2 at 164.41 nm through the Rydberg state R((1)Σu) have been studied using the high-resolution H atom Rydberg tagging technique. Experimental evidences show that two different predissociation pathways exist to form the ground C4H (X(2)Σ(+)) and electronically excited C4H (A(2)Π) products: the former has statistical and isotropic translational energy distribution through internal conversion (IC) to the ground state, while the latter has non-statistical and anisotropic translational energy distribution through IC to the excited repulsive state. The vibrational progressions of C4H (A(2)Π) products have also been observed and assigned.
authors.affiliation: State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road Dalian 116023, China.
authors.forename: Shengrui
authors.initials: S
authors.lastname: Yu
authors.forename: Shu
authors.initials: S
authors.lastname: Su
authors.forename: Yongwei
authors.initials: Y
authors.lastname: Zhang
authors.forename: Dongxu
authors.initials: D
authors.lastname: Dai
authors.forename: Kaijun
authors.initials: K
authors.lastname: Yuan
authors.forename: Xueming
authors.initials: X
authors.lastname: Yang